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Who inflated my tires? !

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by tzx4, Apr 6, 2016.

  1. tzx4

    tzx4 Active Member

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    Took delivery of my Two Eco on 2/19. Today I just got around to making sure the tire pressures were up to snuff.
    Umm ...... the fronts had 56.5psi each and the rears had 55.5psi each. Set them to 39.5 front and 39 rear. The trip back from the filling station showed no noticeable decrease in MPG, (76.6) on the dash display, and bonus!, a slightly smoother and quieter ride.
     
    #1 tzx4, Apr 6, 2016
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  2. fuzzy1

    fuzzy1 Senior Member

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    The one-way trip segment is not a good indicator, especially when elevation changes and cold vs warm start issues appear. Round trips under the same conditions will be more meaningful.

    If the tires were trip-warmed when you measured and reset the pressure, be sure to check again in the morning when they are cold. The difference can be several psi.
     
    #2 fuzzy1, Apr 6, 2016
  3. tzx4

    tzx4 Active Member

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    The tires were cool to he touch at the filling station, and the elevation change from there to home was a gain of less than 100 ft.
     
    #3 tzx4, Apr 6, 2016
    Last edited: Apr 7, 2016
  4. ericbecky

    ericbecky Hybrid Battery Hero

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    Someone who want you to get awesome mpg must have set your tires. Nicely done.
     
    #4 ericbecky, Apr 6, 2016
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  5. wjtracy

    wjtracy Senior Member

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    We have another thread like this, believe Tideland advises they ship with high pressure to keep tires round and dealer is supposed to adjust
     
    #5 wjtracy, Apr 6, 2016
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  6. Blizzard_Persona

    Blizzard_Persona Senior Member

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    What psi are the ECO's tires supposed to be set at per the spec's?

    We know that they are being shipped outfitted with the exact same tires on the ECO's as the base two, simply that they are to be pumped up a little more...
     
    #6 Blizzard_Persona, Apr 7, 2016
  7. Tideland Prius

    Tideland Prius Moderator of the North
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    Yup. My smart fortwo had a low tire pressure light on. When I checked the tires, one of the rear was set to 44 PSI. Recommended is 29/36 psi (not a typo).
     
    #7 Tideland Prius, Apr 7, 2016
  8. Mendel Leisk

    Mendel Leisk Senior Member

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    Dealership goofed off on Pre-Delivery Inspection. Maybe contact the dealership, talk to the Service Manager, tell them the pressures you found, ask them go over the checklist again, this time for real.
     
    #8 Mendel Leisk, Apr 7, 2016
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  9. pakitt

    pakitt Senior Member

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    Well, if it might make you feel better, the other day I got my summer tires mounted in place of the winter tires, and yesterday I wert to check their pressure and they were at 2,1/2,0 bar, and they should be at 2,4/2,3 bar (I don't know the values in psi).
    I put them at 2,6/2,5 bar, and guess what - today the fuel consumption was markedly better and the steering wheel was lighter.
    I wonder, did it ever cross their mind to check the tire pressure, ever?
     
    #9 pakitt, Apr 7, 2016
  10. ETP

    ETP 2021 Prime(Limit),Highlander HYB Plat,B52-D,G,F,H

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    Exactly, suggest 42 the answer to all things in life and never go below 36. IMHO
    40 cold is good also.

    BTW/some manufacturers run them up as high as 90 for mounting(new 1969 Corolla)/boy did it ride rough. I suggest they never checked your tires before delivery as well as other stuff BTW. Also I had a dealer put 22 PSI in my brand new car at the wash rack. I was weaving all over the interstate and my wife wanted to know if I was drinking.:LOL:

    Tire pressure affects long term tire wear significantly.
     
    #10 ETP, Apr 9, 2016
    Last edited: Apr 9, 2016
  11. I'mJp

    I'mJp Senior Member

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    After reading all of this I went out and checked my tires (a trim 4). 37.5 psi in the front 36.5 psi in the back. Seems good to me.

    On my previous car, a 2012 trim 4 touring, I kept my tires at 50psi. Every 5000 miles, after a visit to the dealer, they would be back to factory.

    jp
     
    #11 I'mJp, Apr 9, 2016
  12. Blizzard_Persona

    Blizzard_Persona Senior Member

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    Lol, you have to tell the service manager to make sure the mechanic does not alter your tire pressure if that's what you want. Or instruct them to set it to your desired tire pressure. Even then they will probably forget and still mess it up, so it's still good to check anyways afterwards.
     
    #12 Blizzard_Persona, Apr 9, 2016
  13. ETP

    ETP 2021 Prime(Limit),Highlander HYB Plat,B52-D,G,F,H

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    Yep, they complain but they will do it anyway. They will put on the ticket factory specs and leave your tires lone. Legal issue.
     
    #13 ETP, Apr 12, 2016
  14. narf

    narf Active Member

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    Yup, took delivery of my 4 Touring two days ago. When I got home I checked the tire pressure and it was at 52 all around. Factory recommended pressures are 33/32 for the 45 series tires. I took them down to 38/37. Car road a lot less harsh after that.
     
    #14 narf, Apr 20, 2016
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  15. ETP

    ETP 2021 Prime(Limit),Highlander HYB Plat,B52-D,G,F,H

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    Liked mine so much I ordered a second one. Touring has a great ride and quiet tires.
     
    #15 ETP, Apr 21, 2016
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